(plaintiff, same-sex partner of decedent who was named as agent under medical power of attorney for decedent, failed to state claim under Florida law for negligence, intentional infliction of emotional distress or breach of fiduciary relationship for alleged damages arising from hospital staff's failure to provide updates on decedent's medical situation; evidence showed that hospital staff consulted with plaintiff about critical emergency medical decisions for decedent and that further information or visitation within discretion of hospital staff).